EP1377416B1 - Procede ainsi que cylindre de perforation d'un film mince - Google Patents

Procede ainsi que cylindre de perforation d'un film mince Download PDF

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Publication number
EP1377416B1
EP1377416B1 EP02722967A EP02722967A EP1377416B1 EP 1377416 B1 EP1377416 B1 EP 1377416B1 EP 02722967 A EP02722967 A EP 02722967A EP 02722967 A EP02722967 A EP 02722967A EP 1377416 B1 EP1377416 B1 EP 1377416B1
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EP
European Patent Office
Prior art keywords
cylinder
perforating
fibre
film
wall thickness
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Expired - Lifetime
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EP02722967A
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German (de)
English (en)
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EP1377416A2 (fr
Inventor
Karst Jan Van Weperen
Bernard Pierre Diebels
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Stork Prints BV
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Stork Prints BV
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/26—Perforating by non-mechanical means, e.g. by fluid jet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • B29C59/06—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using vacuum drums

Definitions

  • the invention relates to methods and devices for perforating a thin film, in particular a plastic film, in which the film is guided over a hollow perforating cylinder, which is provided with through-openings separated by dykes and is made from fibre-reinforced plastic, and a fluid pressure difference is applied to the film, such that perforations and/or indentations are formed in the thin film according to the preamble of claims 1, 2, 3, 13,14 and 15.
  • a method and a device of this kind is known in the art, for example from US-A-30541480, which represents the closest prior art.
  • This document discloses inter alia a method for manufacturing decorative thermoplastic sheet products, wherein a uniformly softened thermoplastic material web is contacted with a continuously moving molding element, while a surface of the thermoplastic material web is subjected to a fluid pressure differential, e.g. vacuum, such that the softened material flows into perforations of the molding element until rupture occurs.
  • the molding element may be a hollow cylinder, which is perforated in accordance with a predetermined design. It is said that the molding element can be made of a variety of materials, among which are a synthetic resin or plastic sheet, that can be reinforced with fibre or fabric lamination.
  • woven wire mesh is preferred.
  • the molding element is mounted around the surface of a stationary supporting cylindrical drum in a manner, which allows free rotation of the molding element around the drum.
  • the products obtained are suitable for use as simulated fabrics and woven materials.
  • a cylinder of this type has to be rigid (in the longitudinal direction), in particular if the length is relatively great, so that the cylinder is easy to handle, cannot easily be damaged, while sagging of the cylinder remains within acceptable limits.
  • a fibre-reinforced plastic material is understood as meaning a plastic matrix layer which incorporates reinforcing fibres.
  • the perforating cylinder can have a relatively small wall thickness (at most approximately 1 mm), thereby achieving weight reduction and improved handling and processing. Due to the increased strength and rigidity, the presence of a fully supporting drum as in US-A-3 054 148 is not required.
  • unidirectional fibres in principle provides the highest strength which can be achieved. Furthermore, the highest fibre content can be achieved in layers with unidirectional fibres, and consequently the highest modulus of elasticity can be achieved when using fibres of this type.
  • a single layer of plastic with incorporated fibres which are oriented in one direction has anisotropic elastic properties, i.e. the properties are dependent on the direction in which the load acts.
  • this anisotropy is in fact made use of in order to counteract deformation in the direction of the load, which load may occur during the perforating method.
  • the exact direction of the load and therefore the most favourable direction of orientation of the fibres in the plastic matrix may differ from case to case.
  • the improved ease of handling the perforating cylinder may require an upper limit of the wall thickness not to be exceeded, also taking into account the axial length and diameter.
  • the total wall thickness is advantageously in the range from 0.010-1 mm (10-1.000 micrometers). More preferably, the total wall thickness is in the range from 0.010-0.700 mm, and most preferably in the range from 0.020 - 0.300 mm.
  • the oriented fibre direction to run parallel to the longitudinal axis of the cylinder.
  • the direction of orientation of the fibres preferably runs perpendicular to the longitudinal axis of the cylinder.
  • the cylinder comprises a first layer having fibres in a first direction of orientation of the fibres, and a second layer having fibres in a second direction of orientation of the fibres, the first and second directions of orientation being identical.
  • the separate layers with unidirectional fibres may have a high fibre content (compare a fibre content of 63% by volume for a unidirectional carbon fibre in epoxy resin with a fibre content of approximately 35% by volume for a nonwoven in epoxy resin), which is advantageous for the elastic properties.
  • the fibre content of the cylinder according to the invention is preferably greater than 45% by volume, more preferably greater than 55% by volume.
  • a perforating cylinder of this type is assembled advantageously from at least two layers of fibre-reinforced plastic, the fibres in one layer being oriented in one direction, the fibre directions of the various layers not running parallel to one another.
  • the direction of orientation of the fibres in the first layer advantageously forms an angle ⁇ with the longitudinal axis of the cylinder
  • the direction of orientation of the fibres in the second layer advantageously forms an angle - ⁇ with the longitudinal axis of the cylinder.
  • the cylinder may advantageously also comprise an additional layer having fibres in a third oriented direction of the fibres, which direction is either parallel or perpendicular to the longitudinal axis of the cylinder. More preferably, this additional layer is located between the first and second layers.
  • a suitable angle ⁇ is 0°, 30°, 45° and angles of more than 60°.
  • a three-layer laminate has, for example, angles of 0° and ⁇ 60°, or 0° and ⁇ 45°, or 0° and 90° (x2) with respect to the longitudinal axis of the cylinder.
  • Other examples are 90° ⁇ 30°, or 90° ⁇ 45° or 0° (x2) and 90° with respect to the longitudinal axis of the cylinder.
  • Multilayer laminates preferably with a symmetrical structure as seen in the thickness direction, can also advantageously be employed.
  • the layer with fibres which are oriented parallel to the longitudinal axis of the cylinder is greater than the layer thickness of the other layers. Furthermore the ratio of the total wall thickness to the radius R (in mm) of the cylinder is advantageously less than or equal to 0.0050 (d tot /R ⁇ 0.0050). Cylinders of this type are extraordinarily thin and therefore lightweight, yet still have the required mechanical properties and can easily be processed.
  • the directions of orientation of the fibres, the layer thickness and the materials can be varied, although there are preferred directions and materials, depending on the required final treatment, as has already been stated above.
  • suitable fibre materials include carbon fibres, inorganic fibres, such as glass fibres and boron fibres, metal fibres and organic polymer fibres, such as stretched fibres, for example aramid fibres and fibres of stretched high-strength polyethylene, as well as combinations thereof. Carbon fibres and inorganic fibres are particularly preferred, and of these carbon fibres are most preferred.
  • the plastic used for the plastic matrix is not critical, since compared to the fibres this plastic matrix makes little contribution to the mechanical properties of the cylinder.
  • the plastic can be selected from known thermoplastics, such as polyesters, and thermosetting plastics, such as epoxy resins. The combination of carbon in epoxy is preferred, on account of the excellent relationship between cost price and strength.
  • the perforating cylinder is provided with through-openings or continuous openings, through which openings a fluid pressure difference is applied to a surface of the film. It is advantageous for a vacuum to be applied to the underside of the film, for which purpose the interior of the hollow perforating cylinder is connected to a suitable vacuum source. Another possibility is to create an excess pressure on the outer side of the film, which is guided over the cylinder, which is provided with openings, using a pressurized fluid, such as gas or liquid.
  • Perforated plastic films are produced by heating a thin film, for example of polyethylene, and guiding the film which has been heated in this way over the perforating cylinder and sucking the film partly into the openings by means of a vacuum which is applied to the film through the openings in the cylinder.
  • a vacuum which is applied to the film through the openings in the cylinder.
  • this method can also be carried out using a molten film which has been produced from granules.
  • a cylinder of this type can be used both for perforating and for deforming (embossing), depending on the selected operating conditions and the film properties.
  • the longitudinal axis of a through-opening advantageously forms an angle ⁇ with a tangent plane on the cylinder at the location of the opening, this angle not being equal to 90°.
  • an inclined configuration of the through-openings of this type it is possible to form what are known as slanted holes in the film during perforation, which is favourable with a view to pressing the perforations closed in the final product. This property of the film is desirable in particular when the film is used in health and hygiene products.
  • DE-A1-198 42 956 discloses a perforated sheet product having such slanted holes, and a perforating cylinder having oblique openings.
  • the relationship between the wall thickness d of the cylinder, the hydraulic diameter D of an opening and the angle ⁇ which the longitudinal axis of the opening forms with a tangent on the cylinder at the location of the opening is d ⁇ D/cos ⁇ .
  • the ratio of the thickness (d) of the cylinder to the maximum ratio (r max ) of an opening on the working side of the cylinder is advantageously more than 1.15. This means that the plastic film does not stick to the cylinder and also cannot become caught on the inner side of the cylinder through the openings.
  • Examples of products, made from a thin film that is perforated according to the invention, comprise absorbent articles, such as absorbent items for personal hygiene, for example diapers, but also decorative items.
  • the through-openings in the perforating cylinder can easily be made with the aid of high-energy radiation, such as a laser or an electron beam.
  • the through-openings may be arranged randomly, in a regular pattern or in a configuration in which the openings together form an image.
  • the possibilities also include decorative patterns, and also clustered openings which together define, for example, a logo or other mark.
  • the openings may have different diameters, for example first openings with a first diameter being arranged in a first area, and second openings with a second diameter being arranged in a second area, which second area does not correspond to the first area.
  • Other possible configurations include combined patterns of such openings with different diameters or areas which partially overlap one another.
  • the statements which have been made above in connection with openings also apply in a similar way to relief elements, such a protuberances and recesses, in combination with perforating openings.
  • the fibres in the fibre-reinforced plastic layer are preferably oriented axially, with a view to sagging, advantageously in a range from 0-20° with respect to the longitudinal axis of the embossing cylinder. If the perforating cylinder is supported by a supporting roller, the fibres in the fibre-reinforced plastic layer are preferably oriented radially, on account of expansion, advantageously in the range from 70-90° with respect to the longitudinal axis of the cylinder.
  • Embossing and perforating may advantageously be combined if the cylinder is produced suitably for this purpose.
  • the cylinder comprises a section with through-openings which are used to make the perforations, and a relief area which is used for the embossing.
  • the fibre-reinforced plastic material is easy to process, for example, as indicated above, by means of high-energy radiation, such as a laser, but also by punching, stamping or cutting using water jets, the openings and uneven relief structures can be applied in any form.
  • the invention also relates to a perforating cylinder as defined in claims 13-25.
  • Fig. 1 shows a thin-walled hollow cylinder 10 made from epoxy which is reinforced with carbon fibres in the circumferential direction and is provided at both ends with a smoothing area 12 (only one of which is shown) for smoothing a thin plastic film web 14.
  • the smoothing area 12 comprises a number of projections in a linear pattern, which are denoted overall by reference number 13 in this figure, for the sake of simplicity.
  • the projections force, in the indicated direction of rotation of the cylinder 10, the edges of the film web 14 outwards.
  • there is a relief area 16 comprising a pattern of protuberances 18 with recessed sections between them, for applying a relief to the film web 14.
  • a perforating area 20 which comprises a pattern of through-openings 22 applied using a laser.
  • a vacuum device which is connected to the interior of the cylinder 10, so that the film web 14 can be sucked up through the openings 22, is not shown.
  • Fig. 2 shows a cross section through the perforating area 20.
  • the openings 22 are delimited by dykes 24.
  • the maximum radius of an opening 22 on the operating side of the cylinder 10 is denoted by r max .
  • the thickness of the cylinder is denoted by d. d/r max is greater than 1.15.
  • the rounded corners 26 ensure that the film 14 is released successfully.
  • Fig. 3 shows that the openings 22 are not arranged radially in the direction of the radius R of the cylinder, but rather obliquely, so that the longitudinal axis of an opening 22 forms an angle ⁇ 90° with the tangent plane 1 at the location of the opening 22.
  • the total wall thickness is indicated by d tot .
  • Fig. 4 shows another detail of the cylinder 10 shown in Fig. 1.
  • the hydraulic diameter of an opening 22 is denoted by D.
  • the longitudinal axis of the opening 22 forms an angle ⁇ with a tangent plane 1 on the cylinder 10 at the location of the opening 22.
  • the relationship d ⁇ D/cos ⁇ applies, so that when the opening 22 is viewed in a direction perpendicular to the tangent plane on the cylinder, it is impossible to see any direct transmission of light.
  • This embodiment of the cylinder is particularly favourable for obtaining plastic film with slanted holes.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Laminated Bodies (AREA)
  • Moulding By Coating Moulds (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Claims (25)

  1. Procédé pour la perforation d'un film mince (14), en particulier un film plastique, dans lequel le film (14) est guidé au dessus d'un cylindre de perforation creux (10), qui est pourvu d'ouvertures traversantes (22) séparées par des ponts (24) et fabriqué en plastique renforcé de fibres, et une différence de pression fluide est appliquée au film (14), de telle sorte que des perforations sont formées en le film mince (14), caractérisé en ce que le cylindre de perforation est un cylindre à paroi mince (10) maintenu dans des anneaux terminaux, ledit cylindre (10) ayant une épaisseur de paroi totale dans une plage de 0, 010 à 1 mm, dans lequel les fibres du plastique renforcé de fibres sont orientées axialement dans une plage de 0 à 20° par rapport à l'axe longitudinal du cylindre (10).
  2. Procédé pour la perforation d'un film mince (14), en particulier un film plastique, dans lequel le film (14) est guidé au dessus d'un cylindre de perforation creux (10), qui est pourvu d'ouvertures traversantes (22) séparées par des ponts (24) et fabriqué en plastique renforcé de fibres, et une différence de pression fluide est appliquée au film (14), de telle sorte que des perforations sont formées en le film mince (14), caractérisé en ce que le cylindre de perforation est un cylindre à paroi mince (10) supporté par un rouleau de support, ledit cylindre (10) ayant une épaisseur de paroi totale dans une plage de 0, 010 à 1 mm, dans lequel les fibres du plastique renforcé de fibres sont orientées radialement dans une plage de 70 à 90° par rapport à l'axe longitudinal du cylindre (10).
  3. Procédé pour la perforation d'un film mince (14), en particulier un film plastique, dans lequel le film (14) est guidé au dessus d'un cylindre de perforation creux (10), qui est pourvu d'ouvertures traversantes (22) séparées par des ponts (24) et fabriqué en plastique renforcé de fibres, et une différence de pression fluide est appliquée au film (14), de telle sorte que des perforations sont formées en le film mince (14), caractérisé en ce que le cylindre de perforation est un cylindre à paroi mince (10) ayant une épaisseur de paroi totale dans une plage de 0, 010 à 1 mm, assemblé à partir d'au moins deux couches de plastique renforcé de fibres, les fibres d'une couche étant orientées dans une direction, les directions des fibres des différentes couches ne s'étendant pas parallèlement les unes aux autres.
  4. Procédé de performation selon l'une quelconque des revendications précédentes, caractérisé en ce que l'épaisseur de paroi totale du cylindre est dans une plage de 0,010-0,700 mm.
  5. Procédé de perforation selon la revendication 4, caractérisé en ce que l'épaisseur de paroi totale du cylindre est dans une plage 0,020-0,300 mm.
  6. Procédé de perforation selon l'une quelconque des revendications précédentes, caractérisé en ce que le plastique renforcé de fibres comprend une ou plusieurs couches avec des fibres unidirectionnelles.
  7. Procédé de perforation selon l'une quelconque des revendications précédentes, caractérisé en ce que la teneur en fibres est supérieure à 45% en volume.
  8. Procédé de perforation selon la revendication 7, caractérisé en ce que la teneur en fibres est supérieure à 55% en voiume.
  9. Procédé de perforation selon l'une quelconque des revendications précédentes, caractérisé en ce que l'axe longitudinal d'une ouverture traversante (22) forme un angle β avec un plan tangent (1) au cylindre (10) à l'emplacement de l'ouverture correspondante (22), sous réserve que β ≠ 90°.
  10. Procédé de perforation selon l'une quelconque des revendications précédentes,
    caractérisé en ce que la relation entre l'épaisseur (d) de la paroi du cylindre (10), le diamètre hydraulique (D) d'une ouverture (22) et l'angle α que forme l'axe longitudinal de l'ouverture (22) avec le plan tangent (1) au cylindre (10) à l'emplacement de l'ouverture (22) est : d ≥ D/cosα.
  11. Procédé de perforation selon l'une quelconque des revendications précédentes, caractérisé en ce que le rapport de l'épaisseur (d) de la paroi du cylindre (10) au rayon maximal (rmax) d'une ouverture (22) sur le côté de travail du cylindre (10) est supérieur à 1,15.
  12. Procédé de perforation selon l'une quelconque des revendications précédentes, caractérisé par le gaufrage simultané d'une autre section du film (14), la surface extérieure du cylindre de perforation (10) comprenant également une zone en relief (16).
  13. Cylindre de perforation pour la perforation d'un film mince, comprenant un cylindre creux (10) qui est pourvu d'ouvertures traversantes (22) séparées par des ponts (24), et est fabriqué en plastique renforcé de fibres, caractérisé en ce que le cylindre de perforation est un cylindre à paroi mince (10) maintenu dans des anneaux terminaux, ledit cylindre (10) ayant une épaisseur de paroi totale dans la plage de 0, 010 à 1 mm, dans lequel les fibres du plastique renforcé par des fibres sont orientées axialement dans une plage de 0 à 20° par rapport à l'axe longitudinal du cylindre (10).
  14. Cylindre de perforation pour la perforation d'un film mince, comprenant un cylindre creux (10) qui est pourvu d'ouvertures traversantes (22) séparées par des ponts (24), et est fabriqué en plastique renforcé de fibres caractérisé en ce que le cylindre de perforation est un cylindre à paroi mince (10) supporté par un rouleau de support, ledit cylindre (10) ayant une épaisseur de paroi totale dans la plage de 0, 010 à 1 mm, dans lequel les fibres du plastique renforcé par des fibres sont orientées radialement dans une plage de 70 à 90° par rapport à l'axe longitudinal du cylindre (10).
  15. Cylindre de perforation pour la perforation d'un film mince, comprenant un cylindre creux (10) qui est pourvu d'ouvertures traversantes (22) séparées par des ponts (24), et est fabriqué en plastique renforcé de fibres caractérisé en ce que le cylindre de perforation est un cylindre à paroi mince (10) ayant une épaisseur de paroi totale dans la plage de 0, 010 à 1 mm, qui est assemblé à partir d'au moins deux couches de plastique renforcé de fibres, les fibres d'une couche étant orientées dans une direction, les directions des fibres des différentes couches ne s'étendant pas parallèlement les unes aux autres.
  16. Cylindre de perforation selon l'une quelconque des revendications précédentes 13 à 15, caractérisé en ce que l'épaisseur de paroi totale du cylindre est dans la plage 0,010-0,700 mm.
  17. Cylindre de perforation selon la revendication 16, caractérisé en ce que l'épaisseur de paroi totale du cylindre est dans la plage 0,020-0,300 mm.
  18. Cylindre de perforation selon l'une quelconque des revendications précédentes 13 à 17, caractérisé en ce que le plastique renforcé de fibres comprend une ou plusieurs couches avec des fibres unidirectionnelles.
  19. Cylindre de perforation selon l'une quelconque des revendications précédentes 13 à 18, caractérisé en ce que la teneur en fibres est supérieure à 45% en volume.
  20. Cylindre de perforation selon la revendication 19, caractérisé en ce que la teneur en fibres est supérieure à 55% en volume.
  21. Cylindre de perforation selon l'une quelconque des revendications précédentes 13 à 20, caractérisé en ce que l'axe longitudinal d'une ouverture traversante (22) forme un angle β avec un plan tangent (1) au cylindre (10) à l'emplacement de l'ouverture correspondante (22), à condition que β ≠ 90°.
  22. cylindre de perforation selon l'une quelconque des revendications précédentes 13 à 21, caractérisé en ce que la relation entre l'épaisseur (d) de la paroi du cylindre (10), le diamètre hydraulique (D) d'une ouverture (22) et l'angle α que forme l'axe longitudinal de l'ouverture (22) avec un plan tangent (1) au cylindre (10) à l'emplacement de l'ouverture (22) est : d ≥ D/cosα.
  23. Cylindre de perforation selon l'une quelconque des revendications précédentes 13 à 22, caractérisé en ce que le rapport de l'épaisseur (d) de la paroi du cylindre (10) au rayon maximal (rmax) d'une ouverture (22) sur le côté de travail du cylindre (10) est supérieur à 1,15.
  24. Cylindre de perforation selon l'une quelconque des revendications précédentes 13 à 23, caractérisé en ce que les ouvertures traversantes (22) présentent différents diamètres.
  25. Cylindre de perforation selon l'une quelconque des revendications précédentes 13 à 24, caractérisé en ce que le cylindre comprend également au moins une zone en relief (16) pour le gaufrage du film fin.
EP02722967A 2001-04-12 2002-04-10 Procede ainsi que cylindre de perforation d'un film mince Expired - Lifetime EP1377416B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL1017834 2001-04-12
NL1017834A NL1017834C2 (nl) 2001-04-12 2001-04-12 Werkwijze voor het uitvoeren van een bewerking van een dunne folie.
PCT/NL2002/000230 WO2002083378A2 (fr) 2001-04-12 2002-04-10 Procede de realisation d'un traitement sur un film mince

Publications (2)

Publication Number Publication Date
EP1377416A2 EP1377416A2 (fr) 2004-01-07
EP1377416B1 true EP1377416B1 (fr) 2006-03-15

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EP02722967A Expired - Lifetime EP1377416B1 (fr) 2001-04-12 2002-04-10 Procede ainsi que cylindre de perforation d'un film mince

Country Status (9)

Country Link
US (1) US20040195730A1 (fr)
EP (1) EP1377416B1 (fr)
CN (1) CN1538898A (fr)
AT (1) ATE320331T1 (fr)
AU (1) AU2002253712A1 (fr)
DE (1) DE60209889T2 (fr)
ES (1) ES2256462T3 (fr)
NL (1) NL1017834C2 (fr)
WO (1) WO2002083378A2 (fr)

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WO2013009203A1 (fr) * 2011-07-08 2013-01-17 Airbus S.A.S. Procédé et appareil doté d'un tambour présentant des parties en relief permettant de produire une partie centrale pour un panneau structurel composite
US10149390B2 (en) 2012-08-27 2018-12-04 Mycronic AB Maskless writing of a workpiece using a plurality of exposures having different focal planes using multiple DMDs
TWI581947B (zh) * 2015-07-01 2017-05-11 三芳化學工業股份有限公司 具有立體紋路之複合材及其製造方法
KR20180093912A (ko) * 2015-12-11 2018-08-22 트레데가르 필름 프로덕츠 코포레이션 3-차원 마이크로-개구를 갖는 하이드로-포밍 필름
CN107364269A (zh) * 2017-06-26 2017-11-21 苏州派艾格包装材料有限公司 一种高效耐磨的压花辊结构

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DE19842956C2 (de) * 1998-09-18 2002-08-29 Bp Chemicals Plastec Gmbh Perforierter Film mit schräg-winkeligen Kapillaren
BR0009415A (pt) * 1999-04-01 2002-03-26 Procter & Gamble Pelìcula polimérica tridimensional resiliente aperfeiçoada com aberturas capilares inclinadas e artigo absorvente com folha de forro que compreende a pelìcula

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ES2256462T3 (es) 2006-07-16
US20040195730A1 (en) 2004-10-07
EP1377416A2 (fr) 2004-01-07
CN1538898A (zh) 2004-10-20
DE60209889T2 (de) 2006-09-21
ATE320331T1 (de) 2006-04-15
WO2002083378A2 (fr) 2002-10-24
AU2002253712A1 (en) 2002-10-28
NL1017834C2 (nl) 2002-10-15
WO2002083378A3 (fr) 2003-01-09
DE60209889D1 (de) 2006-05-11

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